HTere are definitely items that are of limited use even if you want to argue that all knowledge has a use. There is very little benefit in knowing the philosophy of Confucius and the science of igneous rock layers for the vast majority of people.
So let’s hear where it gets you in life to study Shakespeare? Why does anyone need to know calculus or geometry?
I went to, well you can tell from my screen name...

So we never learned about Confucius's philosophies, nor any of the other ancient garbage philosophies out there (you don't need to, to pass the regents or AP US history...), but knowledge of some of them are usefull especially when learning the machshava of rishonim.
But my frumy cousin who went to a learning all the time Mesivta comes to me all the time to find out what the metzius is behind this sugya or the other... Zmanim, Molad, Maazalos, how does the water get into the ground and come out in a maayan etc.
I've helped numerous friends and relatives who never learned basic economics - bec they didnt take economics, they were maybe, maybe learning an extra 10 blatt bekius in a winter zman - steer clear of risky investments.
My math and geometry skills were a great help when I learned Eiruvin - to the point that there were sugyos that I had chidushim in, that almost no one in the chabura could understand - bec the hadn't the background in geometery (I later found some of them in the Tashbatz and Meiri).
If you learn some math and science, its much harder to be fooled by the vast amount of garbage science and statistics in the anti vax movement.